package bird;

/**
 * Created by Frank on 2017/8/28.
 */

public class Bird {

    double velocity;

    public void fly() {
    }

    public double getVelocity() {
        return velocity;
    }

    /**
     * 获取速度
     * @param velocity
     */
    public void setVelocity(double velocity) {
        this.velocity = velocity;
    }
}
